1. Research Centre for Reproductive Health (T.E.H., R.J.N.), University of Adelaide, Department of Obstetrics and Gynecology, The Queen Elizabeth Hospital, Woodville, South Australia 5011, Australia
2. Department of Obstetrics and Gynecology (R.S.L.), Penn State College of Medicine, Milton S. Hershey Medical Center, Hershey, Pennsylvania 17033